Author(s):

SK Sameera, Dr. T Bhagavatha Priya, S Isha Parveen, Dr. CV Chandra Mohan Reddy and Dr. Mhemanth Kumar

Abstract: Twenty advance breeding lines of Sorghum were evaluated for their genetic diversity with regards to grain yield and yield components. The genotypes were classified into twelve clusters, based on Mahalanobis D2 statistics. Geographical and genetic diversity were observed to be unrelated, as varieties from diverse geographical regions were placed in the same cluster, while varieties from the same centre were grouped into different clusters. Results on inter-cluster distances revealed maximum diversity between varieties of cluster VI and XI. Intra-cluster distance was maximum for cluster IV, indicating the existence of variability within the cluster for the characters studied. A perusal of the results on cluster means revealed higher grain yield (kg/ha), more 100 seed weight (g) for cluster VII, whereas higher fodder yield (kg/ha) accompanied with more plant height (cm) was observed in cluster IV which is a indicative of desirability of selection of varieties from these clusters for improvement of grain yield and the yield characters. Further, Plant height followed by 100 seed weight and fodder yield along with grain yield and panicle length together had accounted for 88.41 per cent of the total genetic divergence indicating their importance in the choice of parents for hybridization programmes.

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